134
Śrimad-Bhāgavatam
[Canto 6, Ch. 9]
Therefore He is the cause of all causes, the manifester of intelligence and the senses. He is perceived as the Supersoul of everything. Without Him, everything would be dead. You, as that Supersoul, the supreme controller, are the only one remaining.
PURPORT
The words  sarva-vastuni vastu-svarūpaḥ  indicate that the Supreme Lord is the active principle of everything. As described in the  Brahma-saṁhitā  (5.35):
eko 'py asau racayitum jagad-aṇḍa-koṭim 
    yac-chaktir asti jagad-aṇḍa-cayā yad-antaḥ 
    aṇḍāntara-stha-paramāṇu-cayāntara-stham 
    govindam ādi-puruṣam tam aham bhajāmi
“I worship the Personality of Godhead, Govinda, who enters the existence of every universe and every atom by one of His plenary portions and thus manifests His infinite energy throughout the material creation.” By His one plenary portion as Paramātmā,  antaryāmī , the Lord is all-pervading throughout the unlimited universes. He is the  pratyak , or  antaryāmī , of all living entities. The Lord says in  Bhagavad-gītā  (13.3),  kṣetrajñam cāpi mām viddhi sarva-kṣetreṣu bhārata : “O scion of Bharata, you should understand that I am also the knower in all bodies.” Because the Lord is the Supersoul, He is the active principle of every living entity and even the atom ( aṇḍāntara-stha-paramāṇu-cayāntara-stham ). He is the actual reality. According to various stages of intelligence, one realizes the presence of the Supreme in everything through the manifestations of His energy. The entire world is permeated by the three  guṇas , and one can understand His presence according to one’s modes of material nature.
TEXT 39
अथ ह वाव तव महिमामृतरससमुद्रविष्रुषा सकृदवलीढया स्वमनसि निष्यन्द- 
    मानानवरतसुखेन विस्मारितदृष्टश्चुतविषयसुखलेशामासाः परमभागवता 
    एकान्तिनो भगवति सर्वभूतप्रियसुदृढि सर्वात्मनि नितरां निरन्तरं निर्गुण-